Jonathan was born in 1720. He passed away in 1816.
Sources
Comstock, Cyrus B., 1907. A Comstock Genealogy: Descendants of William Comstock of New London, Conn., who died after 1662. The Knickerbocker Press, New York, NY. page 22 (#181)
U.S., Sons of the American Revolution Membership Applications, 1889-1970
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DNA Connections
It may be possible to confirm family relationships with Jonathan by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Jonathan:
Comstock-2902 and Comstock-1096 appear to represent the same person because: I created the later version because a match wasn't coming up, but later found the correct previous entry.